Weft-detecting mechanism



Aug. 25, 1925.

. E. H. RYON WEFT DETECTING MECHANISM Filed on. 20, 192;

2 Sheets-Sheet 1 Aug. 25, 1925.

E. H. RYON WE FT DETECTING MECHANISM 2 Sheets-Sheet 2 Filed Oct. 20, 1923 /NVENTO/(" Armqwm Patented Aug. 25, 1925.

UNITED STATES PATENT OFFICE.

EPPA H. RYON, OF PASADENA, CALIFORNIA, A-SSIGNOR TO CROMPTON & KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION MASSACHU- SETTS.

WEFT-DETECTING MECHANISM.

Application filed October 20, 1923. Serial No. 669,870.

To all whom it may concern:

Be it known that I, EPPA H. RYoN, a citizen of the United States, residing at Pasadena, in the county of Los Angeles and State of California, have invented a new and useful Weft-Detecting Mechanism, of which the following is a specification.

This invention relates to weft detecting mechanism for a weft replenishing loom and particularly to certain improvements in the type of weft detecting mechanism shown in my prior Patents No. 1,345,508, No. 1,369,- 47 3 and .No. 1,37 2,316. In this type of mechanism, the transferrer is given a transferring movement at regularly repeatedmtervals, commonly on each alternate beat of the lay, and the detecting devices are mounted to move with the transferrer. The weft-engaging member is preferably of the slipfeeler type and swings upon its plvot when there is too little yarn on the bobbin to pre vent movement of theweft-engaging mem ber along the bobbin or weft carrier. An indicating device on the transferrer is moved to operative position when suchslipping or angular movement of the detectlng member occurs and it is one object of my invention to provide means effective to complete such movement of the indicating device to operative position after an initial movement has been given thereto by the weft-engaging detecting member.

When the indicating device is in operative position it acts to indicate substantial weft exhaustion and torelease a correspondlng weft carrier as in my prior patents.

Asecond object of my invention is to provide an improved actuating device for en gaging the detecting mechanism and ad]- vancing the detecting member as the transferrer moves downward.

A third feature of my invention relates to certain improvements in the construction of the resetting device.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.-

A preferred form of the invention is shown in the drawings in which- Fig. 1 is a left hand side elevation of parts of a stationary weft carrier magazine embodying my improvements;

Fig. 2 is a sectional front elevation, taken along the line 22 in Fig. 1;

Fig. 3 is an enlarged detail perspective view, looking 1n the direction of the arrow 3 in F 1g. 2;

, Fig. tis an enlargedrear elevation of the.

transferrer and the detecting mechanism mounted thereon, with certain parts shown in section; and

, Figs. 5 and 6 are views similar to Fig. 4t but showmg the parts indifferent succes:

sive positions.

Referring to thedrawings, I have shown a portion of a stationary magazine of the general type more fully disclosed in my prior Patent No. 1,372,316 and comprising 7 'a selected weft carrier may be released and advanced to transfer position upon indication of weft exhaustion of a particular kind or color of weft.

The parts thus far describedare of the usual type and in themselves comprise no part of my present invention.

A transferrer 15 is pivoted at 16 on the magazine frame 10 and is actuated through a link 17 by a cam (not shown) or other suitable actuating mechanism, said mechanism giving the=transferrer 15 a downward transferring movement at. regular intervals, preferably at every alternate beat ofthe lay, as fully shown and described in my prior patent No. 1,372,316. I

The transferrer 15 is provided with an oifset member 20 which is of open section and supports a lever 21,.to one end of which is pivotally secured at 22 a weft engaging or detecting member 23.

lever 21 and limits swingingmovement of the detecting member 23 in one direction.

A link 26 is pivoted at 27 to the member 2-3 and at its opposite end has a swivel connection with a piston or slide 28 mounted in a bearing 29 in the offset portion 20 of the transferrer 15. A spring 30 is interposed between the head of the link 26 and the end of the bearing 29 and yieldingly moves the member 23 and lever 21 t0 the normal or raised position shown in Fig. 4. i V

A stud or pin 31 (Fig. 4) is slidably An adjustable stop screw 24 engages a shoulder 25 on the mounted in the bearing 29 andris preferably provided with a Vshaped groove 32 and a conical end 33. A block 34 is slidably mounted in a transverse recess in the transferrer head and is yieldingly forced against the pin 31 by a fiat spring 35. The head or weft-engaging part 36 of the C181 tecting member 23 is preferably ribbed or toothed as shown in Figs. 4 to 6 and is held from slipping axially of the bobbin by engagement of these ribs or teeth with the weft on the weft carrier. The parts thus assume the relative position shown in Fig. 5 during downward movement of the transferrer-when the detecting member engages a full or partially full bobbin.

If, however, the weft on the bobbin is substantially exhausted, the teeth on the detector head will secure no grip upon the bobbin and the offset application of pressure to the detecting member will cause said member to rock as indicated in Fig. 6. Such movement compresses the spring 30 and advances the piston or'slide 28 to advance the pin 31 to project beyond the face of the transferrer.

Engagementof the detecting member 23 with the weft carrier or bobbin is caused by contact of a lug 40 (Fig. 1) on the free end ofthe' lever 21 with the head 41 of a lever 42 mounted upon a fixed pivot 43 and held yieldingly in adjusted raised position by a spring 44. If rocking movement of the lever 21 is restricted by engagement of the member 23 with a full weft carrier, as indicated in Fig. 5, the head 41 and arm 42 are swung downward against the yielding tension of the spring 44;

The sliding block 34 normally holds the pin 31 from accidental displacement and also has the further function that it assists in advancing the pin 31 to the indicating position shown in Fig. 6 by engagement of the block with the conical end surface 33 after the block is forced out of the V-shaped groove 32. The slide 28 thus produces an initial movement only of the pin 31- and further movement thereof is caused or assisted by the block 34.

As the transferrer 15 rises with the pin 31 in the position shown in Fig. 6, the pin engages the bevel or cam face 46 of an actuating level 47 (Figs. .1 and 3) pivoted at v48 on the magazine frame 10 and connected to rock the casting 12 and selectively raise one of the slides 11. As the transferrer 15 approaches its upper limit of travel, it engages a yielding stud or stop 49 mounted on the bell crank lever 47 and rocks the lever 47 and lever 12 in the opposite direction. If there has been no change in the longitudinal position of the casting 12, the indicated weft carrier will be released and will descend to transfer position.

H The bell crank 47 is provided with a cam surface 50 spaced above the cam surface 46 and effective to force the pin or stud 31 back to the normal position shown in Fig. 4 when this surface is engaged by the pin 31 during the continued upward movement of the transferrer 15. It sometimeshappens that the transferrer is not raised to its extreme upper limit of movement, particularly if the loom is being turned by hand, and accordingly I provide a third cam surface 51 on the bell crank 47 so that the pin 31 may be reset by downward movement if it isnot raised sufficiently to be reset by the cam SUTIRCG 50 upon continued upward movement. Provision is thus made for re setting the pin 31 under any and all tions of operation.

Having thus described my invention. and the advantages thereof, it is believed that the operation will be readily apparent to those skilled in the art. It will be also evident that changes-and modifications can be made therein within the spirit and scope of the claims hereto appended. Accordingly I do not wish to be otherwise limited to the details herein disclosed but whatI claim is c 1. In aweft replenishing 100m, in com bination, a transferr'er, a detecting member mounted on said transferrer andmovable therewith, an indicating device-receiving initial indicating movement from said detecting member, and separate means .to complete said indicating movement. I i

2. In a weft replenishing loom, in C0111? bination, a transferrer, a detecting member mounted on said transferrer and movable therewith, an indicating device receiving initial indicating movement from said detecting member, and a spring actuated device elfective to complete said indicating movement. I

3.111 a weft replenishing loom, incombination, a transferrer, a detecting member mounted on said transferrer and movable therewith, anindicating device receiving initial indicating movement from said detecting member, said device having a surface thereon inclined with respect to its direction of movement,-and yielding means positioned to engage said inclined surface and complete said indicating movement.

condi- -4. In a weft replenishing loom, in com bination, a transferrer, a detecting member mounted on saidtransferrer and movable therewith,- an indicating device receiving initial indicating movement from said detecting member, a link effective to transmit movement fromsaid detecting member to said indicating device but having no positive connection withlsaid device, and a spring yieldingly resisting movement of said member and link from normal position.

5. In a weft replenishing loom, in combination, a transferrer, a detecting member mounted on said transferrer and movable therewith an indicating device receiving initial indicating movement from said detecting member, and a lever having a cam surface engaged by said indicating device in its upward movement for actuation thereby, said lever having a second cam surface effective to reset said indicating device upon continued'upward movement thereof, and having also a third cam surface effective to reset said indicating device upon subsequent downward movement thereof.

6. In a weft replenishing loom, in 00111- bination, a transferrer, a detecting member mounted on said transferrer and movable therewith, an indicating device receiving initial indicating movement from said detecting member, and a lever engaged by said indicating device in its upward movement for actuation thereby, said lever having a yielding stop mounted thereon and engaged by the transferrer upon its upward tion and positioned above said portion with its ends adjacent the ends of said portion, said lever and end portion being pivotally connectecl'near their middle points, a detecting member pivoted to one end of said lever adjacent the outer projected end of said transferrer, and a device yieldingly en gaging the opposite end of said lever adjacent the main arm of said t'ransferrer, to give said member a detecting movement.

In testimony whereof I have hereunto aflixed my signature.

EPPA H. RYON. 

